White light reflecting from the front and back surfaces of this soap film combines to make shimmering colors.
Interference
Slowly pull the cord and raise the bar out of the soapy water to make a soap film. Notice the constantly changing colors in the soap film. Pull rhythmically on the string or gently shake the top bar to make a pattern of waves in the soap film. Stand a few feet away from the film and blow on it gently.
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